Thanks for the feedback. I don't believe that what is happening is related to the categories. I have uploaded two screenshots, taken 30 seconds apart. Sometimes when you click on the menu the page shows up. Sometimes not. I call it the "Now you see it, now you don't" bug.
Would you have any recommendations where to look to begin troubleshooting this outside of the category listings?
I also noticed that the content title is missing too. Like the page doesn't even load.